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Sci Total Environ

Title:		Effects of thermal aging on the electronic and structural properties of Pt-Pd and toluene oxidation activity
Author(s):		Kim SI; Im M; Cho E; Jang H; Jang SY; Kim DW; Kim KW; Heo I; Kim YJ; Lee JH;
Address:		"Center for Environment and Sustainable Resources, Korea Research Institute of Chemical Technology (KRICT), Daejeon, Republic of Korea. Development team, Ecroprohn, Cheongji-si, Chungcheongbok-do, Republic of Korea; Department of Chemical Engineering, Chungbuk University, Chungcheongbuk-do, Republic of Korea. Development team, Ecroprohn, Cheongji-si, Chungcheongbok-do, Republic of Korea; Department of Environmental Energy Engineering, Kyonggi University, Gyeonggi-do, Republic of Korea. Center for Environment and Sustainable Resources, Korea Research Institute of Chemical Technology (KRICT), Daejeon, Republic of Korea. Electronic address: leejh@krict.re.kr"
Journal Title:		Sci Total Environ
Year:		2022
Volume:		20220725
Issue:
Page Number:		157482 -
DOI:		10.1016/j.scitotenv.2022.157482
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Catalytic oxidation is a feasible method for remediating volatile organic compounds (VOCs), due to its lower energy consumption and mineralization of VOCs into H(2)O and CO(2). Noble metal-based catalysts are preferred for the catalytic oxidation of VOCs because of their superior activity, but they are usually deactivated by thermal aging which sinters the metal particles. Here, we report that Pt-Pd/Al(2)O(3) thermally aged at 700-900 degrees C in air showed enhanced catalytic activity for toluene oxidation in humid conditions. There were electronic and structural changes in the thermally aged Pt-Pd/Al(2)O(3), as confirmed by numerous analyses. Both Pt and Pd existed in a metallic rather than oxidized state without additional reduction steps. The noble metal particles were assembled to form Pt-Pd alloy, in the form of isolated Pd atoms surrounded by Pt atoms. This specific alloy structure was found to be crucial to the observed enhancement in catalytic toluene oxidation at low temperature"
Keywords:		Alloys/chemistry Carbon Dioxide Catalysis Electronics Metals Oxidation-Reduction *Toluene *Volatile Organic Compounds/chemistry Catalytic oxidation Pt-Pd alloy Thermal aging Toluene VOCs;
Notes:		"MedlineKim, Seung-Ik Im, Mintaek Cho, Eunji Jang, Haneul Jang, Seo Yun Kim, Dong Woo Kim, Ki Wang Heo, Iljeong Kim, Young Jin Lee, Jin Hee eng Netherlands 2022/07/29 Sci Total Environ. 2022 Nov 15; 847:157482. doi: 10.1016/j.scitotenv.2022.157482. Epub 2022 Jul 25"